Circuit Resistance Checks - Komatsu 930E-2 Shop Manual

CIRCUIT LOCATION
11B1
*
11
*
15V
TB21
71GE
TB22
71TCI
TB23
439
TB25
10V
TB28
11SL
TB28
11ST
TB28
15PV
TB29
11S
TB30
11A
TB30
11T
TB30
11FR
TB30
11HTR
TB30
712
TB32
71
TB32
11L
CB30
12M
*
12F
*
E03015 3/01
TABLE I. CIRCUIT RESISTANCE CHECKS
(All readings taken from circuit to ground)
APPROX.
VALUE
∞
*Measure at the 12VDC insulator in the Electrical Interface Cabinet.
*Measure at the 24VDC insulator in the Electrical Interface Cabinet.
∞
All devices listed for 11A circuit reading must be OFF.
∞
120Ω
17FL349 Panel Only (Not applicable on 17FL373 Panel.)
120Ω
∞
∞
∞
Engine service lights turned OFF.
∞
∞
∞
Ground level engine shutdown switch open
The following must be turned OFF:
Brake cabinet service light, operator cab light, passenger seat
∞
compartment service light, hazard lights, headlights, ground level engine
shutdown switch, engine governor heater switch (MTU 396 only - in
Electrical Interface Cabinet), left and right side engine service lights.
Engine governor heater switch in Electrical Interface Cabinet open.
>36Ω
(MTU 396 engine only)
∞
(MTU 396 engine only)
∞
(MTU 396 engine only)
∞
The Electrical Interface Cabinet service lights must be switched OFF.
∞
∞
Measure at circuit breaker CB30 in cab.
*Measure at AID Module terminal B-13 under passenger seat in cab.
>10Ω
*Measure at AID Module terminal B-12 under passenger seat in cab.
>200Ω
AC Drive System Electrical Checkout Procedure
(Release 17 Software)
NOTES
E3-5